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how one man was rescued just hours from death. good morning everybody. i'm randi kaye. we start this hour with a historic credit card settlement that could have you paying more out of your pocket. if you're just joining us, here's the deal. visa, mastercard and some of the country's biggest banks have agreed to a massive settlement with retailers that totals a whopping $7.25 billion. the lawsuit centers around credit card swipe fees. merchants allege credit card companies were fixing the price on those fees, but the proposed settlement now gives retailers the green light to tack on...

For example, that's going to be the closest because they're going to share at least about 50% of the dna. with siblings that are full siblings, actual siblings, they could share up to 50% as well, but it's a little less clear because parents don't always give the same amount of genetic material to each child or the same type of genetic material. with half-siblings it becomes even a little more complicated. but the thing is as you add more and more relatives, more and more reference samples to compare, you start increasing your likelihood of confidence. so for example, if there were a lot of re...

Qaeda leader. officials said the bin laden family dna was used to make the identification. it all sounds very "csi." left some people wondering can dna testing really be done so fast? chief medical correspondent and certified medical examiner dr. sanjay gupta joins me now. sanjay, i had no idea it could be done that fast. it seems like the government was able to confirm a match very, very quickly. >> yeah, you know, typically when you're talking about dna sequencing that's the process that can take a long time, really sequencing someone's entire genome. this is different. what they're doing he...

Able to confirm a match very, very quickly. >> yeah, you know, typically when you're talking about dna sequencing that's the process that can take a long time, really sequencing someone's entire genome. this is different. what they're doing here is they're trying to actually look at -- trying to create a match here. so you know, if you look at most people, you know, we share about 99% of our dna. that's in common. so instead they're focusing on areas that are different between people. if you have some reference samples, for example, people who are relatives, in this case of bin laden, you star...

Do they need to run tests on all the samples simultaneously, or i assume they would have done that ahead of time and therefore just needed to compare the dna from bin laden to the samples they already had. >> that's exactly right. so essentially, if you have known samples from known siblings or known relatives of in this case the person, bin laden, you basically create reference samples. so you have all of those relatives or reference samples sort of lined up and then you bring in this new sample and you start to actually compare it to do this matching. and again, looking for areas that are so...